Load Specifications
Load data in caliber .357 Mag. with .358 | 155gr | Rim Rock DEWC bullet and 67 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N105, Vihtavuori 3N38 and ADI AP 100.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 60% and propellant combustion ≥ 80%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 72% | 37,130 psi | 85% | 1293 fps | 100% |
| Accurate No. 7*² | <<locked>> | 72% | 36,405 psi | 84% | 1440 fps | 94.7% |
| Accurate No. 9* | <<locked>> | 80% | 36,056 psi | 83% | 1427 fps | 89.2% |
| Accurate Solo 1000² | <<locked>> | 76% | 39,015 psi | 90% | 1214 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 76% | 35,940 psi | 83% | 1237 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 35,998 psi | 83% | 1424 fps | 90.5% |
| ADI AP 100 | <<locked>> | 92% | 35,824 psi | 82% | 1375 fps | 99.7% |
| ADI AP 70N² | <<locked>> | 64% | 36,883 psi | 85% | 1260 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 37,202 psi | 86% | 1099 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 38,667 psi | 89% | 1145 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 38,812 psi | 89% | 1181 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 38,450 psi | 88% | 1224 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 36,869 psi | 85% | 1234 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 38,566 psi | 89% | 1460 fps | 94.5% |
| Alliant BULLSEYE² | <<locked>> | 68% | 36,796 psi | 85% | 1316 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 38,827 psi | 89% | 1230 fps | 100% |
| Alliant Herco | <<locked>> | 92% | 37,550 psi | 86% | 1325 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 76% | 36,332 psi | 84% | 1424 fps | 99.5% |
| Alliant RED DOT² | <<locked>> | 76% | 36,753 psi | 84% | 1181 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 37,797 psi | 87% | 1332 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 76% | 36,376 psi | 84% | 1316 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 39,305 psi | 90% | 1220 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 92% | 37,144 psi | 85% | 1211 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 68% | 35,244 psi | 81% | 1198 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 72% | 35,665 psi | 82% | 1247 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 37,971 psi | 87% | 1135 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 37,913 psi | 87% | 1375 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 18,289 psi | 42% | 915 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 37,797 psi | 87% | 1270 fps | 100% |
| Lovex D037.1*² | <<locked>> | 72% | 36,405 psi | 84% | 1440 fps | 94.7% |
| Lovex D037.2* | <<locked>> | 80% | 36,753 psi | 84% | 1437 fps | 89.5% |
| Lovex S011² | <<locked>> | 64% | 37,144 psi | 85% | 1224 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 38,957 psi | 90% | 1299 fps | 100% |
| Maxam CSB 1 | <<locked>> | 80% | 36,535 psi | 84% | 1237 fps | 100% |
| Maxam CSB 2² | <<locked>> | 76% | 36,622 psi | 84% | 1237 fps | 100% |
| Maxam CSB 3² | <<locked>> | 76% | 37,086 psi | 85% | 1220 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 35,911 psi | 83% | 1188 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 38,856 psi | 89% | 1171 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 92% | 36,782 psi | 85% | 1470 fps | 87.9% |
| Ramshot Silhouette² | <<locked>> | 64% | 36,811 psi | 85% | 1322 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 38,986 psi | 90% | 1247 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 16,926 psi | 39% | 925 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 38,595 psi | 89% | 1329 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 80% | 38,203 psi | 88% | 1450 fps | 97.1% |
| Rottweil P 801² | <<locked>> | 64% | 38,841 psi | 89% | 1214 fps | 100% |
| Rottweil P 806 | <<locked>> | 84% | 38,479 psi | 88% | 1457 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 36,753 psi | 84% | 1437 fps | 89.5% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 36,405 psi | 84% | 1440 fps | 94.7% |
| SNPE Vectan A0 | <<locked>> | 80% | 36,535 psi | 84% | 1276 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 36,883 psi | 85% | 1230 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 72% | 35,998 psi | 83% | 1240 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 36,782 psi | 85% | 1125 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 84% | 35,955 psi | 83% | 1332 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 39,349 psi | 90% | 1283 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 72% | 37,550 psi | 86% | 1440 fps | 100% |
| Somchem MP200² | <<locked>> | 72% | 37,724 psi | 87% | 1325 fps | 100% |
| Somchem MS200² | <<locked>> | 76% | 37,608 psi | 86% | 1299 fps | 100% |
| Somchem S221² | <<locked>> | 64% | 34,287 psi | 79% | 1371 fps | 97.9% |
| Vihtavuori 3N37² | <<locked>> | 76% | 35,534 psi | 82% | 1345 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 92% | 37,217 psi | 86% | 1424 fps | 97.4% |
| Vihtavuori N105 | <<locked>> | 96% | 37,144 psi | 85% | 1470 fps | 99.6% |
| Vihtavuori N320² | <<locked>> | 72% | 39,305 psi | 90% | 1227 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 33,721 psi | 78% | 1099 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 39,073 psi | 90% | 1280 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 37,405 psi | 86% | 1296 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 38,014 psi | 87% | 1365 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 38,986 psi | 90% | 1286 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 25,498 psi | 59% | 1145 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 22,974 psi | 53% | 1214 fps | 87.2% |
| Accurate No. 9*² | <<locked>> | 76% | 31,357 psi | 72% | 1358 fps | 86.8% |
| Accurate Solo 1000² | <<locked>> | 60% | 26,745 psi | 61% | 1070 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 23,090 psi | 53% | 1070 fps | 100% |
| Accurate TCM*² | <<locked>> | 72% | 27,224 psi | 63% | 1283 fps | 85.6% |
| ADI AP 100*² | 6.8 gr | 60% | 15,287 psi | 35% | 991 fps | 89.6% |
| ADI AP 70N² | <<locked>> | 60% | 32,634 psi | 75% | 1211 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 27,920 psi | 64% | 991 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 26,542 psi | 61% | 1004 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 26,353 psi | 61% | 1033 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 27,949 psi | 64% | 1096 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 23,670 psi | 54% | 1070 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 76% | 22,843 psi | 53% | 1198 fps | 85.7% |
| Alliant BULLSEYE² | <<locked>> | 60% | 29,153 psi | 67% | 1217 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 26,020 psi | 60% | 1073 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 17,114 psi | 39% | 1007 fps | 100% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 22,336 psi | 51% | 1184 fps | 94.7% |
| Alliant RED DOT² | <<locked>> | 60% | 25,280 psi | 58% | 1037 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 33,417 psi | 77% | 1280 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 23,612 psi | 54% | 1135 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 25,527 psi | 59% | 1060 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 16,636 psi | 38% | 932 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 27,949 psi | 64% | 1115 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 25,295 psi | 58% | 1112 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 22,452 psi | 52% | 942 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 33,402 psi | 77% | 1319 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,470 psi | 19% | 686 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 27,108 psi | 62% | 1138 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 22,974 psi | 53% | 1214 fps | 87.2% |
| Lovex D037.2*² | <<locked>> | 76% | 31,981 psi | 74% | 1368 fps | 87.1% |
| Lovex S011² | <<locked>> | 60% | 33,446 psi | 77% | 1181 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 27,557 psi | 63% | 1165 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 21,422 psi | 49% | 1037 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 23,786 psi | 55% | 1076 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 24,772 psi | 57% | 1070 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 26,556 psi | 61% | 1073 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 29,530 psi | 68% | 1066 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 88% | 31,981 psi | 74% | 1401 fps | 85.4% |
| Ramshot Silhouette² | <<locked>> | 60% | 32,866 psi | 76% | 1276 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 31,024 psi | 71% | 1158 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 8,079 psi | 19% | 692 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 21,756 psi | 50% | 1106 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 19,957 psi | 46% | 1135 fps | 87.1% |
| Rottweil P 801² | <<locked>> | 60% | 34,403 psi | 79% | 1168 fps | 100% |
| Rottweil P 806² | <<locked>> | 60% | 17,042 psi | 39% | 1102 fps | 96.1% |
| Shooters World Heavy Pistol*² | <<locked>> | 76% | 31,981 psi | 74% | 1368 fps | 87.1% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 22,974 psi | 53% | 1214 fps | 87.2% |
| SNPE Vectan A0² | <<locked>> | 60% | 21,524 psi | 49% | 1066 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 26,368 psi | 61% | 1102 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 25,585 psi | 59% | 1109 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 29,776 psi | 68% | 1043 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 18,420 psi | 42% | 1047 fps | 97.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 25,715 psi | 59% | 1115 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 24,772 psi | 57% | 1243 fps | 97.6% |
| Somchem MP200² | <<locked>> | 60% | 27,006 psi | 62% | 1184 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 23,917 psi | 55% | 1115 fps | 100% |
| Somchem S221² | <<locked>> | 60% | 29,747 psi | 68% | 1302 fps | 96.5% |
| Vihtavuori 3N37² | <<locked>> | 60% | 21,495 psi | 49% | 1132 fps | 99.3% |
| Vihtavuori 3N38*² | 8.9 gr | 68% | 18,695 psi | 43% | 1102 fps | 87% |
| Vihtavuori N105*² | 8.7 gr | 68% | 15,069 psi | 35% | 1060 fps | 87.2% |
| Vihtavuori N320² | <<locked>> | 60% | 28,123 psi | 65% | 1102 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 14,373 psi | 33% | 823 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 26,876 psi | 62% | 1138 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 23,322 psi | 54% | 1112 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 18,884 psi | 43% | 1073 fps | 98.6% |
| Winchester AutoComp ² | <<locked>> | 60% | 22,350 psi | 51% | 1073 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
* not dangerous but load has suboptimal powder burnt with possible characteristics such as extensive muzzle flash or inaccurate loads.
² fill rate low - you might want to consider using a filler to ensure proper ignition.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 13 powders for .357 Mag. loaded with the .358 | 155gr | Rim Rock DEWC. Vihtavuori N105 delivers the highest muzzle velocity at 1,470 fps; across all powders the maximum-charge window runs from 915 fps to 1,470 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 13 of the 13 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 39–89 %, leaving at least 11 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N32C Tin Star reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Vihtavuori N105, Vihtavuori 3N38, ADI AP 100 rank at the top here: for .357 Mag. with the .358 | 155gr | Rim Rock DEWC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant BLUE DOT burn incompletely and react more sensitively to barrel length and temperature. Baschieri & Pellagri 102 Pistol, Hodgdon Clays, Hodgdon TrailBoss stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.